Siemens SINUMERIK 840D sl Commissioning Manual page 79

16.Select the "Clock synchronous alarms" tab and assign the PROFINET IO system number to
the "NCK" line to which you have added the SINAMICS Control Unit.
17.Double-click the "Details" button to open the "NCK" dialog:
Here, enter "2" for the subprocess image and confirm with "OK". For the "Ti/To mode", select
the option "Fixed". The project is then saved and compiled.
Configuring SINAMICS CU320
Procedure:
1. Select interface X150 in the SINAMICS Control Unit.
2. Open the "Properties" dialog and select the "IO cycle" tab.
3. Under "Isochronous Mode", for the option "Assign IO device ...", select → "NCK".
CNC Commissioning: NC, PLC, Drive
Commissioning Manual, 12/2019, A5E48312804B AA
5.3 Extending the SIMATIC S7 project (PROFINET)
PLC commissioning
79